Semi-truck trailer



FIG. 1 is a top plan view of the novel semi-truck trailer;

FIG. 2 is a side elevational view thereof the opposite side being a mirror image of that shown;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a frontal elevational view thereof;

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a perspective view of the novel semi-truck trailer on a greatly reduced scale, it being understood that the broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a semi-truck trailer, as shown and described. 